Here is the instruction show you guide on how to solve Liebherr machine trouble code SCR system DEF pump out of service error.
Related Contents:
2026 LIEBHERR LiDIA Diagnostic Software
Liebherr Diagnostic Tool with 9 Pin Cable
Reason:
Error is active when, despite activation of the urea pump, no build-up of pressure can be detected on the DEF side of the urea pump to the SCR injector
- Urea pump does not build up any pressure in the DEF line to the injector or cannot suck from the DEF tank to the urea pump
- Maximum time is exceeded during the filling of the DEF line to the injector
Troubleshooting
Consequence:
As the P1121-00 failure is emission relevant, the inducement process starting with P1187-00 “Inducement system – Warning (SCR failure) will begin, leading to a power reduction if the failure is not solved.
- If a second occurrence of the failure comes back, this leads to a repeated offense issue which means that the engine will stay blocked in the latest stage of inducement. As a consequence, Service Technician is needed to remove the power reduction.
BMK
Component Location
D956-D966 A7-04 (SCR only)
D956-D966 A7-05 StageV (SCR Filter)
D9512 A7 04-05-StageV
Primary (A700)
Secondary (A760)
